package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.*;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;


@Service
@Slf4j
public class SetMealServiceImpl implements SetmealService {

    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private DishMapper dishMapper;

    /**
     * 新增菜品
     * @param setmealDTO
     */
    @Override
    @Transactional
    public void save(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        //向套餐表插入一条数据
        setmealMapper.save(setmeal);
        //获取新套餐的id
        Long SetmealId = setmeal.getId();
        List<SetmealDish> setmealDishes=setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(SetmealId);
        });
        //保存套餐与菜品的关系
        setmealDishMapper.insertBatch(setmealDishes);


    }
    /**
     * 套餐分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());

    }


    /**
     * 套餐批量删除
     * @param ids
     * @return
     */

    @Override
    public void deleteBatch(List<Long> ids) {
        //判断当前套餐是否能够删除----是否存在起售中的菜品
        for (Long id : ids) {
            Setmeal setmeal = setmealMapper.getById(id);
            if (setmeal.getStatus() == StatusConstant.ENABLE) {
                //套餐处于起售中，不能处理
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }


        //根据菜品id集合批量删除菜品数据
        setmealMapper.deleteById(ids);
    }


    /**
     * 根据id查询套餐
     * @param id
     * @return
     */
    @Override
    public SetmealVO getById(Long id) {
        //根据id查询菜品数据
        Setmeal setmeal=setmealMapper.getById(id);

        //将查询到的数据封装到VO
        SetmealVO setmealVO=new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        //根据套餐id查询菜品数据
        List<SetmealDish> dishes=setmealDishMapper.getBySetmealId(id);
        setmealVO.setSetmealDishes(dishes);

        return setmealVO;

    }
    /**
     * 修改套餐
     * @param setmealDTO
     * @return
     */
    @Override
    public void updateWithDish(SetmealDTO setmealDTO) {
        Setmeal setmeal=new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //修改基本信息
        setmealMapper.update(setmeal);
        //套餐id
        Long setmealId=setmealDTO.getId();
        //删除原有菜品数据
        setmealDishMapper.deleteBySetmealId(setmealId);
        //重新插入菜品数据
        List<SetmealDish> setmealDishes=setmealDTO.getSetmealDishes();
        if(setmealDishes != null && setmealDishes.size() > 0) {
            setmealDishes.forEach(dish -> {
                dish.setSetmealId(setmealId);
            });
            setmealDishMapper.insertBatch(setmealDishes);
        }
    }
    /**
     * 启用禁用套餐
     * @param status
     * @param id
     * @return
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        //起售套餐时，判断套餐内是否有停售菜品，有停售菜品提示"套餐内包含未启售菜品，无法启售"
        if(status==StatusConstant.ENABLE) {
            List<Dish> dishList=dishMapper.getBySetmealId(id);
            if(dishList!=null && dishList.size()>0) {
                dishList.forEach(dish -> {
                    if(dish.getStatus() == StatusConstant.DISABLE) {
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }

        }
        Setmeal setmeal=Setmeal.builder()
                .status(status)
                .id(id)
                .build();
        setmealMapper.update(setmeal);
    }
    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }
    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }


}
